/*
// Copyright (c) 2016 Intel Corporation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
*/

#pragma once

#define inbounds(X, A, B) ((X) >= A && (X) <= B)

int sign(double x);

double sigmoid(double x);

/**
 * @brief Spherical coordinates as in ISO 31-11.
 */
struct PolarVector {
    double r; /**< Radial distance */
    double theta; /**< Polar Angle */
    double phi; /**< Azimuthal Angle */
};

PolarVector cartesian_to_spherical(double x, double y, double z);
